Photo-Sensitive RAFT-Agents for Advanced Microparticle Design
| Autor: | Michael Kaupp, Martina H. Stenzel, Thomas Tischer, Christopher Barner-Kowollik, Thorsten Hofe, Vanessa Trouillet, Astrid F. Hirschbiel, Udo Geckle, Andrew P. Vogt |
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| Rok vydání: | 2013 |
| Předmět: |
Reversible-deactivation radical polymerization
Polymers and Plastics Organic Chemistry Chain transfer Raft Inorganic Chemistry chemistry.chemical_compound Monomer Polymerization chemistry Polymer chemistry Materials Chemistry Copolymer Ethyl acrylate Reversible addition−fragmentation chain-transfer polymerization |
| Zdroj: | Macromolecules. 46:6858-6872 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/ma401242g |
| Popis: | The current contribution describes the combination of an efficient reversible deactivation radical polymerization process (reversible addition–fragmentation chain transfer (RAFT) polymerization) with a mild light-induced modular ligation technique. A novel RAFT-agent was synthesized which carries a photoactive group based on ortho-quinodimethane (photo-enol) chemistry. The novel photoreactive RAFT-agent controls the polymerization of a wide range of monomers such as styrene, N,N-dimethylacrylamide and a protected glycomonomer (2-(2′,3′,4′,6′-tetra-O-acetyl-β-d-mannosyloxy)ethyl acrylate) with dispersities between 1.07 and 1.17 (3500 g·mol–1 ≤ Mn ≤ 10100 g·mol–1) and quantitative end-group functionalization. The photo-enol group reacts with dieneophiles under mild irradiation (λmax = 320 nm) at ambient conditions – so that the RAFT-group remains intact – and without any catalyst to form block copolymers in a matter of minutes. Furthermore, the RAFT-polymers can be photografted onto porous polymeric (poly(g... |
| Databáze: | OpenAIRE |
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